Using the GRID method the lifetimes of 12 states belonging to four negative
parity bands in Er-168 were measured at the high flux reactor of the Insti
tut Laue-Langevin (ILL). For K-pi = 0(1)(-) and K-pi = 2(1)(-) bands the ab
solute El transitions are in agreement with those obtained within the frame
work of the sdf IBA-1 model and their octupole vibrational character is con
firmed.